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ERIC Number: ED186267
Record Type: RIE
Publication Date: 1980-Apr
Reference Count: 0
A Workshop on Explained Variance: Its Importance and Techniques for Calculation.
Knowledge of the magnitude of effect(s) of an experimental study in science education should be of utmost concern to researchers in the field, but is often not reported. This document describes the concept of "explained variance" in analysis of variance designs and then explains how it can be calculated and reported. Reporting the magnitude of effect(s) of an experimental study in science education allows one to assess the practical significance of the research. Three indices for estimating magnitude of effect(s) are eta-squared, epsilon-squared, and omega-squared. In this document, the last index is used in some detail to illustrate techniques for calculating its value in various designs in science education research. (Author/MK)
Publication Type: Reports - Research; Speeches/Meeting Papers
Education Level: N/A
Authoring Institution: N/A
Note: Paper presented at the annual meeting of the National Association for Research in Science Teaching (53rd, Boston, MA, April 11-13, 1980).